It makes sense comparing Yamaha AVENTAGE RX-A680 vs Integra DTM-6 because they both are able to give some premium features.
A significant difference between the receivers in the number of channels, Yamaha AVENTAGE RX-A680 has 7.2 versus 2.0 for Integra DTM-6. Regarding power, then AVENTAGE RX-A680 has such a W/Ohm ratio - 115/8, 145/6 when DTM-6 has a power of 80/8. The THD is the same and is 0.08%.
Characteristics of digital to analog converter (DAC) are different, Burr-Brown 384 KHz/32-bit for AVENTAGE RX-A680 and AK4438 384 KHz/32-bit for the DTM-6. Only the AVENTAGE RX-A680 supports Bi-amping feature. The Yamaha AVENTAGE RX-A680 can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
WI-FI modules have the same characteristics: 2.4/5GHz. Rivals from our review have Bluetooth support. The Yamaha AVENTAGE RX-A680 has support for AirPlay, AirPlay 2, and its competitor in our comparison - AirPlay. Spotify can be used on each receiver. The AVENTAGE RX-A680 can work with the audio stream from Deezer, TIDAL, Pandora, Napster, SiriusXM, Qobuz, and the DTM-6 can receive a content from Deezer, TIDAL, Pandora, TuneIn Radio. Only the AVENTAGE RX-A680 provides HDMI signal transmission in standby mode. The AVENTAGE RX-A680 can scale the input HDMI signal, unlike the DTM-6. Dolby Vision technology found support only on the AVENTAGE RX-A680. Only the AVENTAGE RX-A680 supports HDMI Audio Return Channel (ARC). The HDMI eARC is available only on the AVENTAGE RX-A680. Of the two receivers in our comparison, HDMI CEC is present in only the AVENTAGE RX-A680. The DTM-6 has a built-in phono stage for connecting a vinyl player.
Each of the AV receivers from our review supports 2 Multi-room zones. The AVENTAGE RX-A680 supports voice control via Amazon Alexa, Google Assistant, and the DTM-6 - Google Assistant. An ECO mode is only available for the AVENTAGE RX-A680. The setup assistant will help you configure Yamaha AVENTAGE RX-A680.
Only the AVENTAGE RX-A680 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the AVENTAGE RX-A680.